Clean-out router bit



1, June 14,1927. 3. M FOL'LETT ET AL 63 440 CLEAN OUT ROUTER BIT Filed Dec. 11. 1925 A TTORN E Y.

Patented June 14, 1927.

UNITED STATES JAMES M. FOLLETT AND LOUIS LEHNER, (ll? BAY CITY, MICHIGAN.

' CLEAN-OUT ROUTER BIT.

Application filed December 11, 1925. Serial Ito. 24,729.

This invention relates to routing bits and the like and partlcularly to a cleanout routing bit for use in the wood working industry for routing and cleanout work.

Q One object of the invention is to design a.

cleanout routing bit of very simple and substantial construction which will be very economical to manufacture and extremely erlicient in operation and which will eliminate the hand labor which heretofore has been necessary to clean out openings cutby hollow mortising chisels.

A further object is to design a routing bit having a friction collar for minimizing friction and wear between the bit shank and the edges of the work.

The above and other objects will appear as the specification progresses, reference beme" had. to the accompanying drawing in which like reference numerals indicate like parts throughout the several views thereof.

In the drawing.

1 is a side view of our improved cleanout routing bit.

Fig. 2 is a similar view, parts thereof being shown in section.

Fig. 3

view taken on the line 33 of Fig. 2.

4-. is a side view of the friction collar.

Fig. 5 is a top plan view thereof.

Referring now particularly to the drawing in which we have shown the preferred embodiment of our invention, the numeral 5 indicates a conventional bit shank turned intermediate its length to form a shoulder 6, the extreme lower end 7 being further reduced and threaded, andis adapted to engage a threaded opening 8 provided in the turned tubular portion 9 of a cutting member 10.

This cutting member is of conventional design and the cutting edge 11 can be of any desired contour or shape to properly perform the work to be accomplished. A frietion collar 12 is rotatablyv mounted on and embraces the shoulder 6 and tubular portion 9 of the cutting member proper, the lit be ing such that contact with the edge of the opening or groove to be cleaned, or shoulder of the work will allow the shank to freely revolve in the collar, thereby eliminating the friction of the driven bit shank against the edge or shoulder of the groove; this collar we prefer to make of brass to minimize wear.

The collar is lubricated by drilling an oil is a top plan transverse sectional fore this work has been done by hand labor using chisels, which is a slow and expensive operation, with our improved cleanout routingbit, this hand labor is entirely eliminated, and the work quickly and efficiently accomplished.

From the foregoing description it will be obvious that we have perfected a very simple, economical and eficient bit for routing and cleanout work.

hat we claim is 1. A router bit comprising a shank, the lower end of which forms a cutter, a collar revolubly mounted on said shank directly adjacent the cutting end, said collar being of the same diameter as the cutting end.

2. A router bit comprising a shank, the lower end of which forms a cutter, a turned portion intermediate the length of said shank and a collar revolubly mounted on said turned portion, said collar being of the same external diameter as the shank.

3. A router bit comprising a shank having a turned shoulder intermediate its length and a reduced threaded lower end, a cutting member having a reduced interiorly threaded. portion adapted to receive the threaded end of the shank, and a friction collar revolubly mounted on said shoulder, the external diameter of which is the same as the cutting member.

4;. A router bit comprising a shank having a turtle d shoulder intermediate its length and a reduced threaded. lower end, a cutting member having a reduced interiorly threaded tubular shoulder adapted to receive the threaded end of the shank, a friction collar mounted on said shoulders, and-an oil passage in the shank opening onto said shoulder.

in testimony whereof we hereunto our signatures.

JAMES M. FOLLETT. LOUIS LIEHNER. 

